Burglar-alarm



l. F. HARDWICK.

BURGLAR ALARM.

APPLICATION FILED 0CT.1| 1920- Patented o0@ 4, 41921,

JAMES F. HARDWICK, or owEivsBoRo, KENTUCKY.

BURGLAR-ALARM.

T0, allfwluom it. may concerns i Be it known that I, JAMES E HARDWICK p a citizen ofV the United States, residing at Owensboro, in the county offDaviess, and Stater ofV Kentucky, have invented certain new and useful Improvements in Burglar- Alarms, of which the following is a specilication. l f

The object of my invention is to improve and simplify burglar alarms for residences.

Burglarizing residences has always been aV very dreaded menace, and has grown to alarming proportions withinL the past ten years; at any rate it hasl grown to such an extent that in our larger cities a suitable protection Vagainst same is an' important question to decide, and is within the mind of nearly every one. Up to the present time there has been numerous devices of this character devised, mostly those of the bell type, and which are very unsatisfactory for many reasons. n

Some alarms consist of an electric bell that, when a door or window is opened, will ring continuously and regularly. This is unsatisfactory, principallyV because many people sleep so soundly that even a continuous bell does not awaken them; in other words, it is not reliable, as it is liable to fail at any time. Instead of the regular continuous ringing of the bell or other form of noise,

my invention produces an impulsive alarm, simply by discharging a simple paper cap which is contained and arranged within a small compact device which may be permanently connected to the head casing of the bed room door or any window of the same room and when said door is opened or said window raised, the device will automatically discharge the paper cap, and the impulsein the quiet of the night will positively awaken the persons sleeping in the bedroom, and simultaneously startle the burglar to such a degree that he will think that he was shot Y at, or it will cause him to become stunned as if he pasess through the door the charge will be nearest his head, and if through the window it will produce similar effects. The wonderful advantage of the device is the impulse that it produces; it is reasonable to believe that when a man enters a house for the purpose of robbing same, even though he has in his hand some form of lire arms, he is in a frightened state of mind because of the fact that his motive is wrong, and

y Specicaton'of Letters Patent. Application med october 1, lezofserai No. 413,978.

. y Patented oet. 4,1921.

A beautiful'andscientilic advantage of this 'device is the fact'that itis intended toffrighten the burglar away and not injure him, this subject has been scientifically dis` cussed and it has been thoroughly'decided thaty no person or persons though they are actually caught in the act-of robbing, should be shot, as this would not assist in destroying this difficulty; it has beenv known that in some instances that burglars have been caught in the act and given a straight forward talk and kindness and released without notifying the authorities, therefore if the burglar is frightened away it will give him cause to think upon higher things in i life, and if these devices were universallyk be evenk used he would decide that it would useless to attempt a robbery. It can be plainly seen that the use of my 'device would eventually be the medium by which the evil f burglarizing would be healed.`

Another advantage is that is is so eX- tremely simple that it can be manufactured at a very low cost and sold proportionately. Also it may be easily and quickly attached to any door Casing or window casing with little or no expense for installing.

In the practical development of this device for the market it may become necessary to make certain minor changes in the details of construction, but without a departure from the principle disclosed.

In the drawings: y

Figure l is an elevation of a portion of a door and its frame showing one manner of employing my invention;

Fig. 2 is a plan view of the alarm with the door and door frame .in horizontal section;

Fig. 3 is a detail perspective view of a portion of the alarm.

The invention consists of a plate represented by the numeral l, andy which is in the form of a channel as shown, said plate having a portion 2 in order to accommodate one -end of the shaft 3, another extended portion 4c will accommodate the opposite end of shaft 3, portion 4 containing a Xed bead 5; a coil spring 6 is provided and one end of same has a bearingat 7, while opposite end is connected to the firing lever 8, which is also of the channel type. Firing lever S is provided with a riveted hammer 9. Plate l having bent portions l0 in order that .paper cap ll may be slipped thereunder and to re-l tain same. Holes l2 are provided for screws for connectingl plate l to the casinginside of the room and remains stationary-with the wall.

The device isplaced uponA the door casing in a position in :order to allow `the lever 8 toibe pushed vover the beadyand the force of the spring 6 will cause the hammer 9 to strikeinthe center'of the cap il and discharge same. lVhen not in use the device will remain in the position as described after being discharged, andcan be easily set by pulling leverS to position as shown in Fig. l. The bead 5 will retain samein said position. rthe same device may be used Jfor windows, by simply connectingsarne to the side window casing and connecting an ordinary wood screw into the sash.Y When said sash is raised the screw will strike the lever 8 and cause thedischarge, same as if it were used for the door. f

Having thus described the invention, what is claimed as new is:

A burglar alarmcomprising a channeled plate'provided with spaced ears at one end and having overhanging lips at the opposite end to retain an explosive thereon, said plate being adapted to be secured upon a ixed support, a second channeled plate pivoted at one end between said ears and adapted to extend over a relatively movable object, a spring` coiled v4abo'ut'the,pivotal connection between the 4two members "andy having its opposite ends secured to the respectively adjacent plates whereby to swing the secondmentioned plate vrforcibly onto the first-mentioned plate,f and =a firing-pinoli the Jfree end of'thefsecond-mentioned plate, one of the ears on the first-mentioned plate being'extended beyondthepivot to'ward'the secondmentioned plate and'iprovided with an inwardly extending projection on its inner sideto yieldablyengage over the edge of the second-mentioned platejand normally hold the plates in extended relationagainst the action of the spring. v

n testimony whereof 'I aiiixniy signature.

JAMns F. iHARDwIoK. [L 5;] 

